Unmanned devices displayed at Airshow China 2021

Editor：Wang Xinjuan Time：2021-09-30 14:52:35

Photo taken on Sept. 29, 2021 shows a Yunzhou unmanned speed boat displayed at the 13th China International Aviation and Aerospace Exhibition, or Airshow China 2021, in Zhuhai, south China's Guangdong Province. (Xinhua/Deng Hua)

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